tephra sequences是什么意思

网络释义

用法例句

Experimental investigation on mechanical properties of a volcanic ash with different grain size gradations

不同颗粒级配的某火山灰的力学性质试验研究

By means of contrast and research the eight seams' tonsteins characteristics of the petrography,mineralogy and geochemistry,it can be confirmed that all the tonsteins are the alkalinityvolcanic ash derived tonsteins from different age.

对该地区８层ＴＯＮＳＴＥＩＮＳ的岩石学、矿物学以及地球化学特征的对比、分析，确认其全部为不同期次的同沉积碱性火山灰蚀变粘土岩。

Ten out of thirteen MS peak layers,which are thicker than 4 cm,correlate well with the volcanic ash layers recognized in core MD972142 offshore northwest.

针对磁化率结果显示的13层厚度超过4 cm的磁化率峰值层,将其年代和菲律宾巴拉望岛岸外的MD972142孔的火山灰层进行对比,发现其中10层完全对应,证明磁化率峰值层是由火山喷发作用造成的,说明48万年来菲律宾火山带喷发的粉尘可以沉积到南海西部。

The latent hydraulicity and pozzuolana activity of the slag are tested.

对其潜在水硬性、火山灰性进行了试验研究,测试了水泥试件的抗压强度比,并与普通生铁高炉矿渣、粉煤灰的活性作了对比。

Feasibility of using Tibet s pozzolan as mineral admixture of concrete;

西藏火山灰质材料作为混凝土掺合料的可行性

New information on the response of vegetation to air-fall volcanic ash is provided by analysis of phytoliths from sediments containing major tephra beds.

含火山灰层沉积的植硅体分析为了解植被对从空中下降的火山灰的反应提供新的信息。

A heavy layer of volcanic ash rained down over the Aegean, covering islands and crops.

浓厚的火山灰层大量降下到爱琴海，遮盖了岛屿和农作物。

According to the radiation-optical quality of volcanic ash we calculated the parameter of radiation-optic.

本文根据火山灰粒子的辐射光学特性,计算了火山灰粒子和平流层本底的辐射光学参数。

cut through the layers of loosely compacted ash, eroding deep valleys.

侵蚀着结构松散的火山灰堆积层 形成深深的河谷

They were deposits of volcanic tuff in Nye County, Nevada;

3处场地分别是内华达州奈伊县的火山凝灰岩矿床层；

The studies showed that (1) HFW are found in vocalnic tuff while the others in sedimentary rocks;

(1)前者产出层位是陆相火山爆发相的凝灰岩,后者是河湖相沉积岩;

Computation Method for Shale and Tuff Content in Reservoir with Pyroclastic Sedimentary Rock

火山碎屑沉积岩储层泥质与凝灰含量计算方法研究

portland-pozzolana cement

火山灰质硅酸盐水泥

A volcano belches smoke and ashes.

火山喷出黑烟和灰土。

ash that was thrown By an erupting volcano.

火山爆发喷到空中的灰

The volcano ejected lava and ashes .

火山喷出熔岩和灰。

The village was overwhelmed by ash from the volcano.

村子被火山灰覆盖。

A volcano emits smoke and ashes.

火山散发着烟和灰。

volcanic ash and lava build the mountains that we call volcanoes.

火山灰和火山岩在喷射口堆积构成了火山。

As bad as the pyroclastic flows are, the ash injected into the atmosphere can have even more far-reaching consequences.

如同火山碎屑流般凶恶，喷发进入大气层的火山灰甚至会造成更深远的影响。

Dense clouds of ash were generated during the volcanic eruption.

火山爆发时, 产生了浓密的火山灰云。

A volcano that vomited lava and ash.

喷出岩浆和火山灰的火山

Lava and ashes erupted from the volcano

熔岩和火山灰从火山中喷出来。